Digitally signing Invoices PDF files in Portugal is getting mandatory and for that it is required to use a cloud based DigitalSign server of the Tax authorities to digitally sign the PDF files.
This is supported in InterFormNG2 with the DigitalSign Module. Please notice, that a license code for InterFormNG2, that includes the DigitalSign module is required.
Here is how you can get started:
Now you can copy the code from the last part of the URL: